A 1000 kg car is moving at a constant speed of 7 m/s when it hits the back bumper of another car with 1200 kg of mass moving in the same direction at a constant speed of 6 m/s. As a result of the collision both bumpers get coupled. Show all work and calculations.
1. What is the combined mass of both cars?
2. What is the combined weight of both cars?
3. What is the total momentum of the system before and after the collision?
4. What is the speed of both cars after the collision?
5. What is the combined kinetic energy of both cars after the collision?

Sorry, I can do part 1 and 2 relatively easily. However, I suck at physics and was honestly hoping to receive an answer like the one you gave me. I just wanted to know how to do it, not necessarily get the answer. Thanks